Bonneville Salt Flats: Learning How-to Set a Record

Bonneville Salt Flats: Land Speed Record Info:

The countdown is on for Speed Week, the land-speed racing event of the year! This Speed Week makes sixty-two years that Southern California Timing Association (SCTA) and Bonneville Nationals Incorporated (BNI) have run this week-long speed spectacular. Since the whole point of the event is the “world’s fastest automotive speed trials” that means SCTA/BNI are responsible for verifying the record breaking speeds. Upon my first Speed Week experience last August, I pondered exactly HOW one breaks the speed record as I watched speedsters, lakesters, roadsters, coupes, pickups, and motorcycles speed from the starting line.

I headed down to the tech inspection area to find out. Every vehicle goes through tech inspection upon arrival to verify both legality and safety. If they’re lucky they’ll go through a second time to verify a broken speed record!

So how do you break a record at Bonneville?

First, you’ve got to build a kick ass car and follow SCTA/BNI’s rules while doing it. All sorts of different classes of cars race at Bonneville. They differ by body style, body modifications, engine size, and fuel used. Pick a class, add a good chunk of cash, plus a crew of noble friends and a good portion of blood, sweat, and tears and you’re ready to go!

Once at Bonneville and passed through tech inspection (and of course with a proper license – they don’t just let any loony out on the track!) you can head out for a run. Bonneville, in case you didn’t know, is a salt flat. That means the extremely flat land is covered in naturally-formed salt crystals. (Editor’s Note: I was amazed to learn that when we say, “Salt” it’s literallytable salt, just a little more chunky. Have a taste!)

Three different tracks run at Bonneville. A long course, short course, and special course. The long course runs for seven miles straight! Within those seven miles you’ve got two miles to build speed followed by three timed miles and ending with two slow-down miles. The short and special course are only five miles in length. The same two miles for building speed and two miles for slow-down, but the difference is you’ve only got one timed mile in between. In order to run on the long course you’ve gotta reach a speed of 175 mph during the first 1/4 mile timed.

At the track, you’ll get in line and wait for your turn. As a spectator, this is one of the really cool things at Bonneville. First of all, varying classes aren’t separated – so you might watch a motorcycle take off one minute and the next it’s a streamliner. Secondly, as all these cars are lined up and waiting, you can go straight up to them – check them out and talk to their crew/driver/owner.

When it comes your time to run… you push your baby and go as fast as possible! Depending on which track you’re running, the middle one or three miles will be timed. If one of those official times beats a previously-set record in your racing class, then congratulations, you’re on your way to breaking a record!

After a record-breaking run, the first place you’ll go is impound. Impound is a holding area where you and your crew will be able to spend four hours working on any modifications you choose to make. This is a crucial decision because after those four hours are up, your car is gonna have to sit in impound, untouched, until the following morning at 7am when it’ll be time for run #2.

Run #2 will prove your speed-record time of your run #1. The average will be taken of both runs and only a record-breaking average of the two runs sets a new record. If you’re running the long course, they’ll be matching up each counted mile. For example, if the previous record was 202.888 mph and your run #1 was 204.262 mph during mile 3 than your run #2 would have to be at least 201.516 during mile 3. Although run #2 didn’t beat the record, the average of the two runs is 202.889, good enough. Obviously, if you had a better run #2, the record would be even higher.

After you’ve made both of your record-breaking runs, the record isn’t official until tech inspection certifies that the engine and fuel used are legal for your running-class… One way they can verify if it’s a legal engine is by pumping it. This is done by removing a spark plug, turning over the engine, and using a special machine that will let them know what displacement the cylinder is. Or if that’s not possible they’ll take off the cylinder head and physically measure displacement.

Once those things check out, congratulations, you’ve set a new speed record!

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5 Comments

Thanks, a little Salt Fix to hold me over for the next 30 days! Can’t wait! Great write up Greaser!

Aug09

casey campbell

That was good information and pictures ,this is or third year running a pick-up A-class only a few more days till we can head-out cant wait casey

Aug26

casey campbell

we made it to bonneville or third year in our 1970 c-10 a class 496 bbc we missed the record by 30 mph were chasing some awsome race team chock full of nuts 1992 chevy from texas were the campbells from central calif were getting closer and the time we spend and the work and the knowledge you learn on this journey the people you meet you make new friends and become closer to the people that goes with you , you cant do this sport as the lone ranger you need the best machine shops parts co alot of fabrications remember this is your dream find your people but dont expect them to do what their not able to do thats where you come in push harder dont push people away and work on safety and more safety and when you get to the salt after months of work and the starter points for you to go and you hammer down the salt and here that big moter scream!!!! ill you know why you did what you did casey campbell